Mostly stuff I did well with, swords, pikes, archers... and cautiously, things I haven't done well with... Barbarian slingers and cavalry of all factions.

Also, I have spent very little time with catapults and war dogs..... Need to learn more before jumping in.

Overall, I approach this game like I approached World of Warships... try out what looks interesting, spend time learning, then decide if you want to continue with that particular unit, commander, faction...

Commander skills factor in to my decisions... I am good at Vercengetorix's "Scorched Earth" only with melee infantry, But, Scipio's "Wrath of Mars" has many applications..

Swords, Roman and Carthaginian. I'm thinking Carthaginian swords will be somewhat similar to the Romans, and figure that I can play one while the other is locked until the game it is in ends. Carthaginian swords are not available until tier 4 or 5. So I will need to play Carthaginian spears at first.